British pilot Paul Bonhomme won his third world title by five points, after winning half of the eight races.
His closest challenger was Australian pilot Matt Hall, and the pair finished well clear at the top of the championship.
After Austria's Hannes Arch won in Rovinj and Budapest, Bonhomme and Hall shared the remaining victories between them; Bonhomme won at Ascot and Fort Worth, while Hall took his first Air Race victories at the Red Bull Ring and Las Vegas Motor Speedway.
The series also maintained the Challenger Cup format that was introduced for the 2014 season, for young pilots to develop their skills.
Mikaël Brageot of France – who had topped the Cup rankings – won the race by 0.035 seconds over Peter Podlunšek, to take the title.